依据四端网络的基本原理，利用力电类比的方法，给出了复合变幅杆的等效电路图；
Based on the theory of four-end network, the equivalent electric circuit diagrams of the horn are given by using the analogous method between methanical force and electric.
对其工作原理进行分析，给出不同工作模式下的等效电路图和回路的参数设计原则。
The equivalent circuits at different operation modes, the analysis of the circuit and principle of parameter design were presented.
主要工作如下：1、根据夹心式换能器的机电等效电路图，推导了换能器的整体频率方程。
The main aspects are as follows:1. Derivate the resonance frequency equation according to the electro-mechanical equivalent circuit of sandwich transducer.
通过试验测得金属氢化物电极的电化学交流阻抗谱(EIS)，经过分析得到该电极的等效电路图。
Electrochemical impedance spectra (EIS) of a metal hydride electrode were interpreted by means of an equivalent circuit.
根据试验现场的实际情况，提出实际试验中的等效电路图，由等效电路图推导出实际的品质因数的计算式。
According to the actual conditions on the test field an equivalent circuit diagram in the actual test has been given, from which a calculation formula for the actual quality factors is derived.
若将他励直流电动机输出功率的机理等效为一个与电动机电枢绕组并联的可变电阻，可以得到他励直流电动机可变电阻型等效电路图。
The output power mechanism of a separately excited DC motor can be equivalent to a variable resistance, which is parallel with the armature winding of the motor.
若将他励直流电动机输出功率的机理等效为一个与电动机电枢绕组并联的可变电阻，可以得到他励直流电动机可变电阻型等效电路图。
The output power mechanism of a separately excited DC motor can be equivalent to a variable resistance, which is parallel with the armature winding of the motor.
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